Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial
Contrasting Greenland and Antarctic temperatures during the last glacial period (115,000 to 11,650 years ago) are thought to have been driven by imbalances in the rates of formation of North Atlantic and Antarctic Deep Water (the ‘bipolar seesaw’). Here we exploit a bidecadally resolved 14C data set...
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Online Access: | https://eprints.gla.ac.uk/143230/ https://eprints.gla.ac.uk/143230/1/143230.pdf |
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ftuglasgow:oai:eprints.gla.ac.uk:143230 2023-12-17T10:20:35+01:00 Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial Turney, Chris S.M. Jones, Richard T. Phipps, Steven J. Thomas, Zoë Hogg, Alan Kershaw, A. Peter Fogwill, Christopher J. Palmer, Jonathan Bronk Ramsey, Christopher Adolphi, Florian Muscheler, Raimund Hughen, Konrad A. Staff, Richard A. Grosvenor, Mark Golledge, Nicholas R. Rasmussen, Sune Olander Hutchinson, David K. Haberle, Simon Lorrey, Andrew Boswijk, Gretel Cooper, Alan 2017-09-12 text https://eprints.gla.ac.uk/143230/ https://eprints.gla.ac.uk/143230/1/143230.pdf en eng Nature Research https://eprints.gla.ac.uk/143230/1/143230.pdf Turney, C. S.M. et al. (2017) Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial. Nature Communications <https://eprints.gla.ac.uk/view/journal_volume/Nature_Communications.html>, 8, 520. (doi:10.1038/s41467-017-00577-6 <https://doi.org/10.1038/s41467-017-00577-6>) (PMID:28900099) (PMCID:PMC5595922) cc_by_4 Articles PeerReviewed 2017 ftuglasgow https://doi.org/10.1038/s41467-017-00577-6 2023-11-23T23:09:09Z Contrasting Greenland and Antarctic temperatures during the last glacial period (115,000 to 11,650 years ago) are thought to have been driven by imbalances in the rates of formation of North Atlantic and Antarctic Deep Water (the ‘bipolar seesaw’). Here we exploit a bidecadally resolved 14C data set obtained from New Zealand kauri (Agathis australis) to undertake high-precision alignment of key climate data sets spanning iceberg-rafted debris event Heinrich 3 and Greenland Interstadial (GI) 5.1 in the North Atlantic (~30,400 to 28,400 years ago). We observe no divergence between the kauri and Atlantic marine sediment 14C data sets, implying limited changes in deep water formation. However, a Southern Ocean (Atlantic-sector) iceberg rafted debris event appears to have occurred synchronously with GI-5.1 warming and decreased precipitation over the western equatorial Pacific and Atlantic. An ensemble of transient meltwater simulations shows that Antarctic-sourced salinity anomalies can generate climate changes that are propagated globally via an atmospheric Rossby wave train. Article in Journal/Newspaper Antarc* Antarctic Greenland Iceberg* North Atlantic Southern Ocean University of Glasgow: Enlighten - Publications Antarctic Greenland New Zealand Pacific Southern Ocean Nature Communications 8 1 |
institution |
Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
English |
description |
Contrasting Greenland and Antarctic temperatures during the last glacial period (115,000 to 11,650 years ago) are thought to have been driven by imbalances in the rates of formation of North Atlantic and Antarctic Deep Water (the ‘bipolar seesaw’). Here we exploit a bidecadally resolved 14C data set obtained from New Zealand kauri (Agathis australis) to undertake high-precision alignment of key climate data sets spanning iceberg-rafted debris event Heinrich 3 and Greenland Interstadial (GI) 5.1 in the North Atlantic (~30,400 to 28,400 years ago). We observe no divergence between the kauri and Atlantic marine sediment 14C data sets, implying limited changes in deep water formation. However, a Southern Ocean (Atlantic-sector) iceberg rafted debris event appears to have occurred synchronously with GI-5.1 warming and decreased precipitation over the western equatorial Pacific and Atlantic. An ensemble of transient meltwater simulations shows that Antarctic-sourced salinity anomalies can generate climate changes that are propagated globally via an atmospheric Rossby wave train. |
format |
Article in Journal/Newspaper |
author |
Turney, Chris S.M. Jones, Richard T. Phipps, Steven J. Thomas, Zoë Hogg, Alan Kershaw, A. Peter Fogwill, Christopher J. Palmer, Jonathan Bronk Ramsey, Christopher Adolphi, Florian Muscheler, Raimund Hughen, Konrad A. Staff, Richard A. Grosvenor, Mark Golledge, Nicholas R. Rasmussen, Sune Olander Hutchinson, David K. Haberle, Simon Lorrey, Andrew Boswijk, Gretel Cooper, Alan |
spellingShingle |
Turney, Chris S.M. Jones, Richard T. Phipps, Steven J. Thomas, Zoë Hogg, Alan Kershaw, A. Peter Fogwill, Christopher J. Palmer, Jonathan Bronk Ramsey, Christopher Adolphi, Florian Muscheler, Raimund Hughen, Konrad A. Staff, Richard A. Grosvenor, Mark Golledge, Nicholas R. Rasmussen, Sune Olander Hutchinson, David K. Haberle, Simon Lorrey, Andrew Boswijk, Gretel Cooper, Alan Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial |
author_facet |
Turney, Chris S.M. Jones, Richard T. Phipps, Steven J. Thomas, Zoë Hogg, Alan Kershaw, A. Peter Fogwill, Christopher J. Palmer, Jonathan Bronk Ramsey, Christopher Adolphi, Florian Muscheler, Raimund Hughen, Konrad A. Staff, Richard A. Grosvenor, Mark Golledge, Nicholas R. Rasmussen, Sune Olander Hutchinson, David K. Haberle, Simon Lorrey, Andrew Boswijk, Gretel Cooper, Alan |
author_sort |
Turney, Chris S.M. |
title |
Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial |
title_short |
Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial |
title_full |
Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial |
title_fullStr |
Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial |
title_full_unstemmed |
Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial |
title_sort |
rapid global ocean-atmosphere response to southern ocean freshening during the last glacial |
publisher |
Nature Research |
publishDate |
2017 |
url |
https://eprints.gla.ac.uk/143230/ https://eprints.gla.ac.uk/143230/1/143230.pdf |
geographic |
Antarctic Greenland New Zealand Pacific Southern Ocean |
geographic_facet |
Antarctic Greenland New Zealand Pacific Southern Ocean |
genre |
Antarc* Antarctic Greenland Iceberg* North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic Greenland Iceberg* North Atlantic Southern Ocean |
op_relation |
https://eprints.gla.ac.uk/143230/1/143230.pdf Turney, C. S.M. et al. (2017) Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial. Nature Communications <https://eprints.gla.ac.uk/view/journal_volume/Nature_Communications.html>, 8, 520. (doi:10.1038/s41467-017-00577-6 <https://doi.org/10.1038/s41467-017-00577-6>) (PMID:28900099) (PMCID:PMC5595922) |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.1038/s41467-017-00577-6 |
container_title |
Nature Communications |
container_volume |
8 |
container_issue |
1 |
_version_ |
1785523772365733888 |